Acceleration sensing apparatus

• US 7,211,998 B2
• Filed: 06/26/2006
• Issued: 05/01/2007
• Est. Priority Date: 06/29/2005
• Status: Active Grant

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Oonishi, Jun
• Primary Examiner(s): Hirshfeld; Andrew
• Assistant Examiner(s): Valone; Thomas
• Application Number:
  US11/474,867
• Publication Number:
  US 20070001678A1
• Time in Patent Office: 309 Days
• Field of Search: 324/422, 324/162, 324/178, 735/140.1
• US Class Current: 324/162
• CPC Class Codes: B60R 2021/01006 Mounting of electrical components in vehicles
• CPC Class Codes: B60R 21/01 Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents electrical circuits for transmission of signals between steering wheel and the vehicle itself B60R16/027; for electrically actuating belt retractor locking means B60R22/343
• CPC Class Codes: B60R 21/0132 responsive to vehicle motion parameters , e.g. to vehicle longitudinal or transversal deceleration or speed value
• CPC Class Codes: G01D 11/245 Housings for sensors
• CPC Class Codes: G01P 1/023 for acceleration measuring devices
• CPC Class Codes: G01P 15/00 Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
• CPC Class Codes: G01P 15/0802 Details

Abstract

A collision sensing apparatus includes an acceleration sensor, first and second connector terminals, reference connector terminals and leads. The acceleration sensor is shaped into a square form. First and second contacts are provided in two diagonally opposed corner portions of the sensor. Reference contacts are arranged in the other two diagonally opposed corner portions of the sensor. The first and second connector terminals are opposed to the first and second contacts, respectively. The reference connector terminals are opposed to the reference contacts, respectively. The leads connect the first and second connector terminals and the reference connector terminals to the first and second contacts and the reference contacts.

Claims

1. A sensing apparatus comprising:

a sensor that senses a physical acceleration in a predetermined direction and is shaped into a quadrangular form, wherein;

the sensor includes a first input/output contact, a second input/output contact and at least one reference contact;

the first input/output contact and the second input/output contact are arranged in two diagonally opposed corner portions, respectively, of the sensor; and

the at least one reference contact is arranged in at least one of the other two diagonally opposed corner portions of the sensor;

a first connector terminal that conducts an input/output signal to the first input/output contact and is arranged such that a sensor side end of the first connector terminal is opposed to one of two adjacent sides of the sensor, which come together at the corner portion of the sensor where the first input/output contact is arranged;

a second connector terminal that conducts an input/output signal to the second input/output contact and is arranged such that a sensor side end of the second connector terminal is opposed to an opposite side of the sensor that is opposite from the side of the sensor, to which the sensor side end of the first connector terminal is opposed;

at least one reference connector terminal that conducts a reference signal to the at least one reference contact and is arranged such that a sensor side end of each of the at least one reference connector terminal is opposed to a corresponding one of two mutually opposed sides of the sensor, to which the first connector terminal and the second connector terminal are not opposed; and

a plurality of leads that connect the first input/output contact, the second input/output contact and the at least one reference contact to the first connector terminal, the second connector terminal and the at least one reference connector terminal, respectively.

2. The sensing apparatus according to claim 1, wherein:

the sensor side end of the first connector terminal is opposed to the corner portion of the sensor, at which the first input/output contact is arranged;

the sensor side end of the second connector terminal is opposed to the corner portion of the sensor, at which the second input/output contact is arranged; and

the sensor side end of the at least one reference connector terminal is opposed to the at least one of the other two diagonally opposed corner portions of the sensor, at which the at least one reference contact is provided.

3. The sensing apparatus according to claim 1, wherein the sensor outputs the sensed physical acceleration from the first input/output contact based on a signal, which is inputted to the first input/output contact.

4. The sensing apparatus according to claim 1, wherein:

the sensor includes;

a sensing device that senses the physical acceleration in the predetermined direction; and

an outputting device that outputs the sensed physical acceleration;

the sensing device and the outputting device are packaged into a single package.

5. The sensing apparatus according to claim 1, wherein:

the sensor includes;

a sensing device that senses the physical acceleration in the predetermined direction;

an outputting device that outputs the sensed physical acceleration;

a power supply device that supplies a drive voltage for driving the sensing device and the outputting device; and

a noise reducing device that reduces noises applied to the sensing device and the outputting device; and

the sensing device, the outputting device, the power supply device and the noise reducing device are packaged into a single package.

6. The sensing apparatus according to claim 1, wherein:

the quadrangular form of the sensor is a square form having the sides of generally equal size;

the at least one reference contact includes two reference contacts, which are arranged in the other two diagonally opposed corner portions, respectively, of the sensor; and

the at least one reference connector terminal includes two reference connector terminals, which conduct the reference signal to the reference contacts, respectively, and are arranged such that the sensor side ends of the reference connector terminals are opposed to the two mutually opposed sides, respectively, of the sensor.

7. The sensing apparatus according to claim 6, wherein:

an extent of the first connector terminal, which is measured in a direction parallel to the side of the sensor that is adjacent to and is opposed to the first connector terminal, is generally equal to an extent of the side of the sensor that is adjacent to and is opposed to the first connector terminal;

an extent of the second connector terminal, which is measured in a direction parallel to the side of the sensor that is adjacent to and is opposed to the second connector terminal, is generally equal to an extent of the side of the sensor that is adjacent to and is opposed to the second connector terminal;

an extent of one of the reference connector terminals, which is measured in a direction parallel to the side of the sensor that is adjacent to and is opposed to the one of the reference connector terminals, is generally equal to an extent of the side of the sensor that is adjacent to and is opposed to the one of the reference connector terminals; and

an extent of the other one of the reference connector terminals, which is measured in a direction parallel to the side of the sensor that is adjacent to and is opposed to the other one of the reference connector terminals, is generally equal to an extent of the side of the sensor that is adjacent to and is opposed to the other one of the reference connector terminals.

8. A sensing apparatus comprising:

a sensor that senses a physical acceleration in a predetermined direction and is shaped into a quadrangular form, wherein;

the sensor includes a first input/output contact, a second input/output contact and at least one reference contact;

the first input/output contact and the second input/output contact are arranged in two diagonally opposed corner portions, respectively, of the sensor; and

the at least one reference contact is arranged in at least one of the other two diagonally opposed corner portions of the sensor;

a first connector terminal that conducts an input/output signal to the first input/output contact and is arranged such that a sensor side end of the first connector terminal is opposed to one of two adjacent sides of the sensor, which come together at the corner portion of the sensor where the first input/output contact is arranged;

a second connector terminal that conducts an input/output signal to the second input/output contact and is arranged such that a sensor side end of the second connector terminal is opposed to an opposite side of the sensor that is opposite from the side of the sensor, to which the sensor side end of the first connector terminal is opposed;

at least one reference connector terminal that conducts a reference signal to the at least one reference contact and is arranged such that a sensor side end of each of the at least one reference connector terminal is opposed to a corresponding one of;

the side of the sensor, to which the first connector terminal is opposed; and

the side of the sensor, to which the second connector terminal is opposed; and

a plurality of leads that connect the first input/output contact, the second input/output contact and the at least one reference contact to the first connector terminal, the second connector terminal and the at least one reference connector terminal, respectively.

9. The sensing apparatus according to claim 8, wherein:

the sensor side end of the first connector terminal is opposed to the corner portion of the sensor, at which the first input/output contact is arranged;

the sensor side end of the second connector terminal is opposed to the corner portion of the sensor, at which the second input/output contact is arranged; and

the sensor side end of the at least one reference connector terminal is opposed to the at least one of the other two diagonally opposed corner portions of the sensor, at which the at least one reference contact is provided.

10. The sensing apparatus according to claim 8, wherein the sensor outputs the sensed physical acceleration from the first input/output contact based on a signal, which is inputted to the first input/output contact.

11. The sensing apparatus according to claim 8, wherein:

the sensor includes;

a sensing device that senses the physical acceleration in the predetermined direction; and

an outputting device that outputs the sensed physical acceleration;

the sensing device and the outputting device are packaged into a single package.

12. The sensing apparatus according to claim 8, wherein:

the sensor includes;

a sensing device that senses the physical acceleration in the predetermined direction;

an outputting device that outputs the sensed physical acceleration;

a power supply device that supplies a drive voltage for driving the sensing device and the outputting device; and

a noise reducing device that reduces noises applied to the sensing device and the outputting device; and

the sensing device, the outputting device, the power supply device and the noise reducing device are packaged into a single package.

13. The sensing apparatus according to claim 8, wherein:

the quadrangular form of the sensor is a square form having the sides of generally equal size;

the at least one reference contact includes two reference contacts, which are arranged in the other two diagonally opposed corner portions, respectively, of the sensor; and

the at least one reference connector terminal includes two reference connector terminals, which conduct the reference signal to the reference contacts, respectively, and are arranged such that the sensor side end of one of the reference connector terminals is opposed to the side of the sensor, to which the first connector terminal is opposed, and the sensor side end of the other one of the reference connector terminals is opposed to the side of the sensor, to which the second connector terminal is opposed.

14. The sensing apparatus according to claim 13, wherein:

an extent of the first connector terminal, which is measured in a direction parallel to the side of the sensor that is opposed to the first connector terminal, is generally equal to an extent of the side of the sensor that is opposed to the first connector terminal;

an extent of the second connector terminal, which is measured in a direction parallel to the side of the sensor that is opposed to the second connector terminal, is generally equal to an extent of the side of the sensor that is opposed to the second connector terminal;

an extent of the one of the reference connector terminals, which is measured in a direction parallel to the side of the sensor that is opposed to the first connector terminal, is generally equal to the extent of the side of the sensor that is opposed to the first connector terminal; and

an extent of the other one of the reference connector terminals, which is measured in a direction parallel to the side of the sensor that is opposed to the second connector terminal, is generally equal to the extent of the side of the sensor that is opposed to the second connector terminal.