JPH02271281A - Detector apparatus - Google Patents

Abstract

PURPOSE:To suppress the expansion of the area of a circuit board in one direction and to make it possible to suppress the oscillation of circuits by a constitution wherein a detecting circuit part and a signal processing circuit part are independent, and both parts are formed on planes which are intersected at a specified angle. CONSTITUTION:A voltage applying common electrode is formed on one surface of a detecting circuit part 1 so that the surface faces a detector 2. Detecting elements 3 are continuously formed on the other surface at a constant pitch. The detecting circuit part 1 is fixed at the side of the common electrode with a conductive bonding agent on the upper surface of a detector board 4. A circuit board 8 is formed on a plane which is intersected with the line of the detector 2 of the circuit part 1. A plurality of signal processing circuit parts 9 facing the detector 2 are arranged on one or both surfaces. The mounting width of the circuit part is suppressed within the width H of the detector 2. In this way, the detector 2 can be arranged in a curved arc shape, crosstalk among the detecting elements 3 can be decreased and the oscillation of the circuits can be suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a detector unit that detects radiation, light, etc. using a detector.

2. Description of the Related Art Conventional technology will be described with reference to FIG. 4 regarding a radiation detector unit used for radiation charge pulse detection, radiation image diagnostic equipment, etc. As shown in FIG. 4, this detector unit includes a first-stage amplifier circuit 5a and a pulse amplifier circuit for each detection element of a detector 2a in which a plurality of detection elements 3a are arranged in series on a circuit board 8a. , a signal processing circuit section 9a consisting of a comparator circuit and a pulse count circuit, and Auv.
It consisted of a means for electrically connecting with a conductor lead wire 17a such as A9, and outputting a radiation detection signal from a connector portion 18a.

Problems to be Solved by the Invention In order to increase the resolution of radiation images, it is necessary to make the pitch of the detection elements as small as possible.

However, as the pitch of the detection elements becomes smaller, the area of the circuit board that is provided with the first-stage amplifier circuit and the signal processing circuit unit facing the detection elements increases, and the detectors are arranged in a plurality of lines and curved arcs. There was a limit to how many pieces could be arranged. or,
As the substrate area increases, the electrical connection distance between the detection element and the first-stage amplifier circuit increases, stray capacitance between connection lines increases, and crosstalk between adjacent first-stage amplifier circuits and signal processing circuits increases. This is likely to occur, causing problems such as circuit oscillation. SUMMARY OF THE INVENTION In view of this, an object of the present invention is to provide a detector unit that suppresses expansion of the area of a circuit board in one direction and suppresses circuit oscillation.

Means for Solving the Problems The present invention provides a detection circuit section consisting of a detector in which detection elements are arranged continuously on a straight line or a curved plate, and a first stage amplifier circuit;
The signal processing circuit section consisting of a pulse amplifier that amplifies the signal detected by the detection circuit section, a comparator circuit, and a pulse count circuit is configured independently and on a plane where both intersect at a certain angle. This is the first feature.

A second feature is that the detection circuit section and the signal processing circuit section are electrically connected through a flexible substrate. Furthermore, a third feature is that the frame for fixing the detection circuit section and the signal processing circuit section is provided with a curved surface section that abuts on an arc of a certain distance and a positioning mechanism.

By making the action detection circuit section and the signal processing circuit section independent and configuring them on planes that intersect at a constant angle, the thickness of the components mounted on the circuit board can be reduced within the width of the arrangement of the detection elements. Detectors can be arranged continuously in straight lines and curved arcs. Furthermore, since the detection circuit section, which generates heat by itself, can be attached in close contact with a metal frame having good thermal conductivity over the entire lower surface, heat dissipation is improved (and the temperature characteristics of the detection circuit section are improved).

Furthermore, since the detection circuit section is connected to the signal processing circuit section through a flexible board, the detection circuit section can be easily replaced. Furthermore, by arranging the first stage amplifier within the detection circuit section and making the electrical connection with the detection element extremely short, stray capacitance between connecting lines can be suppressed to less than IPf (picofarad), resulting in a configuration that eliminates crosstalk and circuit oscillation. It becomes.

Example Below, a detector unit according to an example of the present invention will be described.
This will be explained based on FIGS.

As shown in FIG. 1, the detection circuit section 1 includes a common pole for voltage application on one side facing the detector 2, and a detection element 3 for detecting radiation and light rays on the other side, which are continuous at a constant pitch. On the upper surface of the detector substrate 4 formed with conductive through-holes,
It is fixed to the common electrode side with a conductive adhesive. Further, the detection element 3 is connected to the input part of the first stage amplifier circuit 5 and the lead wire 6.
An electrical connection is made with the lower surface of the detector board 4 and a cable line 7.

As shown in FIG. 1, the circuit board 8 includes the detection circuit section 1.
A plurality of signal processing circuit sections 9 consisting of a pulse amplifier, a comparator circuit, and a pulse count circuit facing the detectors 2 are arranged on one or both sides. Here, the mounting thickness of the circuit components is kept within the width H of the detector.

The flexible board 11 has one ground wire per detection element, one end of which is fixed to the connection part 11a of the detection circuit part 1, and the other end opposed to the electrode part provided on the circuit board 8. After positioning with a pin or the like (not shown), contact is made by suppressing connection, and the detection circuit section 1 and the circuit board 8 can be easily separated from each other to improve maintainability. There is. Also, at this time, if the number of detection elements increases and connection becomes difficult,
It is also possible to make electrical connections on both sides of the circuit board 8 using a plurality of flexible boards 11.

FIG. 2(a) is a diagram in which the detector unit 13 is arranged on an arc at a constant distance from the center point of the radiation source and the light source 12. FIG. FIG. 2(b) shows the detection circuit section 1 and the signal processing circuit section 9.
FIG. 3 is a detailed view of the positioning portion of the unit base 15 as a frame for fixing the unit base 15. FIG.

As shown in FIG. 2(a), the lower surface of the positioning table 14 is in contact with a surface formed on an arc at a certain distance from the center point of the radiation source and the light source 12, as shown in FIG. 2(b). By providing the abutting curved surface portion 15a of the unit base 15 shown in FIG. 1, when a plurality of detector units 13 are arranged, the position of each detection element can be at the same distance from the center point of the radiation source and the light source 12. I have to. Further, positioning pins 16 each having a tip shaped like a thin light are provided on a part of the unit base 15 at about two locations from the center of the detector unit 13 at equal intervals in the longitudinal direction of the detector unit 13, By providing a guide hole 14a into which the positioning pin 16 can be inserted on the surface facing the abutting curved surface of the unit positioning base 14, the position of the detection element in the Xl and Y directions can be adjusted.
Accurate positioning is possible.

At this time, the guide hole 14a is indexed at an angle centered on the radiation source and the light source 12, but the angle is 7.
Arranged at a pitch of 33 degrees, positioning accuracy is ±0.05m
m.

FIG. 3 shows various aspects of a detector unit according to another embodiment of the present invention, in which FIG. 3(a) is a plan view, FIG. 3(b) is a side view, and FIG. 3(C) is a perspective view. This shows that.

There are embodiments in which the detection circuit section 1 and the circuit board 8 intersect at a constant angle as shown in FIGS. 1 and 2, but in the present invention, a configuration as shown in FIG. 3 is also possible. .

As shown in FIG. 3(a), this is an effective arrangement when the bottom surface perpendicular to the detection element 3 has an angle of 01 and the width of the circuit board 8 is smaller than A (width = B). becomes possible. Further, as shown in FIG. 3(b), an effective arrangement method is to make the lower surface perpendicular to the detection element 3 have an angle = θ2, and the height is lower than 20 and within 20. is also possible. Furthermore, it is effective when the upper part is restricted as shown in FIG. 3(C), and when the upper part is flattened and installed within a height of E.

Effects of the Invention Conventionally, there was a limit to the continuous arrangement of detectors as the circuit board expanded, but according to the present invention, the circuit board can be arranged within the width of the detector and the number of detection elements can be increased. Since the shape of the substrate relative to the detector can be arbitrarily enlarged or reduced, the detector can be made into a unit, and the detector can be easily positioned and arranged continuously, either in a curved arc shape or in a straight line.

Further, according to the present invention, since the electrical connection between the detection circuit section and the signal processing circuit section is made by a flexible board, the length =
By setting the width within 35 mm1 to 80 mm, it is possible to configure the sensor with three signal lines and one ground line per -detecting element, thereby reducing crosstalk between the detecting elements and suppressing circuit oscillation.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a perspective view showing the configuration of a circuit board including a detection circuit section and a signal processing circuit section of a detector unit in an embodiment of the present invention, and FIG. 2(a) ~(C) shows the detector unit of this embodiment arranged on an arc at a certain distance from the center point of the radiation source and the light source, (a) is a perspective view of the whole, and (b) is a perspective view of the positioning part. 3 shows various arrangement relationships of the detector unit in other embodiments of the present invention, (a) is a plan view, (b) is a side view, (C) is a perspective view, and FIG. 4 is a FIG. 2 is a perspective view showing a conventional radiation detection configuration. 118. Detection circuit section, 211. Detector, 31. , detection element 418. Detection board, 51. , first stage amplifier circuit, 8119
circuit board, 9. ,,signal processing circuit m,11. ,,Flexible substrate, 12. , , radiation source and light source, 13. ,,
Detector unit, 14. ,, unit positioning stand, 15
．． ,. Unit base, 16. ,,Positioning pin. Name of agent Patent attorney Shigetaka Awano 1 person Figure 1 1 Building Kamiguchijijaki Figure 2 Figure 3 Figure 4 17α 41 Kei Lead 4 ＼ ＼ ＼ 3a Takishi Reiko Procedure Amendment Form ) 7

Claims (3)

[Claims] (1) A detection circuit section consisting of a detector in which detection elements are arranged continuously on a straight line or a curved arc, and a first-stage amplifier circuit, a pulse amplifier, a comparator circuit, and a pulse count that amplifies the signal detected by the detection circuit section. A detector unit characterized in that a signal processing circuit section consisting of a circuit is configured independently and on a plane where both signal processing circuit sections intersect at a fixed angle. (2) Claim 1 characterized in that the detection circuit section and the signal processing circuit section are electrically connected through a flexible substrate.
Detector unit as described. (3) The detector unit according to claim 1, wherein the frame for fixing the detection circuit section and the signal processing circuit section is provided with a curved surface section that abuts on an arc of a certain distance and a positioning mechanism.